UE 2W2D, Инструкция по установке и обслуживанию, Страница: 10 / 16

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SCALE:
(2WLP and 8W2D models only)
The 4-20 mA output on model 2WLP and 8W2D is field scalable. The default setting is 100% of sensor range, where 4 mA
represents 0 and 20 mA is full range scale. If desired, both the 4 mA and 20 mA levels may be set independently to adjust
the portion of the sensor's range represented by the 4-20 mA output.
Enter the Programming Mode (see page 6) and push the left button repeatedly until you reach the 4 mA command.
Press the right button and select POS or NEG. Press the right button and enter the new sensor value that will be
represented by 4 mA. This value must be between -3% and 25% of the sensor's range. Press the right button after
entering the value. Press the left button to reach the 20 mA command. Press the right button and select POS or
NEG. Press the right button and enter the new sensor value that will be represented by 20 mA. This value must be
between 50% and 110% of the sensor's range. Press the right button after entering the value. Exit the Programming
Mode (see page 7).
NOTE: Analog values between 4 and 20 mA are recalculated for the new lower and upper sensor values entered using the
4 mA and 20 mA commands, providing a scaled proportional output that covers a modified portion of the sensor's range.
Scaling the 4-20 mA output over a smaller portion of the sensor's range does not increase the accuracy of the propor-
tional output.
FAULT CODES
Patented IAW
®
diagnostics are capable of detecting many possible fault conditions. Some fault conditions will clear automatically when the parameter returns
to normal; others require the unit to be powered down and restarted; and some are catastrophic and require repair or replacement. A list of fault conditions is
shown below:
DISPLAY WILL SCROLL: FAULT: RESULT: SWITCH
OUTPUT: 4-20 mA
OUTPUT:
PLUG Plugged Port Detected Return to normal when condition clears Open 24 mA
UNDER RANGE Sensor Under Range Return to normal when condition clears As Programmed 3.5 mA (min)
OVER RANGE Sensor Over Range Return to normal when condition clears As Programmed 22.0 mA (max)
EXTREME OVER RANGE Sensor Over Range Return to normal when condition clears As Programmed 24 mA
SENSOR FAULT Open Sensor Recovery on power reset likely if fault does not re-occur Open 24 mA
SENSOR FAULT Shorted Sensor Recovery on power reset likely if fault does not re-occur Open 24 mA
REF. FAULT Reference Voltage Recovery on power reset likely if fault does not re-occur Open 24 mA
P/S OUT OF RANGE Power Supply Recovery on power reset likely if fault does not re-occur Open 24 mA
SWITCH FAULT Switch Voltage Recovery on power reset likely if fault does not re-occur Open 24 mA
KEYPAD ERROR Keypad Shorted Recovery on power reset likely if fault does not re-occur Open 24 mA
WDOG Watch Dog Timer Recovery on power reset likely if fault does not re-occur Open 24 mA
EEPROM CS ERROR EEPROM Checksum error Recovery on power reset likely if fault does not re-occur Open 24 mA
NOTE: The 4-20 mA output may reach 22 mA in an over range condition. 24 mA output is intended to indicate a fault.